./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/ldv-consumption/linux-3.8-rc1-32_7a-drivers--hwmon--w83793.ko-ldv_main0.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ae007674 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/ldv-consumption/linux-3.8-rc1-32_7a-drivers--hwmon--w83793.ko-ldv_main0.cil.out.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 178bcd25ed1eb86cc15df15af8dd3c1e4148e54d6c8cf5e12496bd14ffef1855 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ae00767 [2021-12-28 03:51:22,529 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-28 03:51:22,532 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-28 03:51:22,559 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-28 03:51:22,560 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-28 03:51:22,563 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-28 03:51:22,564 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-28 03:51:22,568 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-28 03:51:22,570 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-28 03:51:22,573 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-28 03:51:22,580 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-28 03:51:22,583 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-28 03:51:22,583 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-28 03:51:22,585 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-28 03:51:22,586 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-28 03:51:22,587 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-28 03:51:22,587 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-28 03:51:22,588 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-28 03:51:22,591 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-28 03:51:22,597 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-28 03:51:22,598 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-28 03:51:22,599 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-28 03:51:22,599 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-28 03:51:22,601 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-28 03:51:22,604 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-28 03:51:22,605 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-28 03:51:22,606 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-28 03:51:22,606 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-28 03:51:22,607 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-28 03:51:22,608 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-28 03:51:22,608 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-28 03:51:22,609 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-28 03:51:22,610 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-28 03:51:22,610 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-28 03:51:22,611 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-28 03:51:22,611 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-28 03:51:22,612 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-28 03:51:22,612 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-28 03:51:22,612 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-28 03:51:22,613 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-28 03:51:22,613 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-28 03:51:22,620 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-12-28 03:51:22,652 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-28 03:51:22,652 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-28 03:51:22,653 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-28 03:51:22,653 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-28 03:51:22,654 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-28 03:51:22,654 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-28 03:51:22,655 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-28 03:51:22,655 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-28 03:51:22,655 INFO L138 SettingsManager]: * Use SBE=true [2021-12-28 03:51:22,655 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-28 03:51:22,656 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-28 03:51:22,656 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-28 03:51:22,656 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-28 03:51:22,656 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-28 03:51:22,657 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-28 03:51:22,657 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-28 03:51:22,657 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-28 03:51:22,657 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-28 03:51:22,657 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-28 03:51:22,657 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-28 03:51:22,657 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-28 03:51:22,657 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-28 03:51:22,658 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-28 03:51:22,658 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-28 03:51:22,658 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-28 03:51:22,658 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-28 03:51:22,658 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-28 03:51:22,658 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-28 03:51:22,659 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-28 03:51:22,659 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-28 03:51:22,659 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 178bcd25ed1eb86cc15df15af8dd3c1e4148e54d6c8cf5e12496bd14ffef1855 [2021-12-28 03:51:22,906 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-28 03:51:22,924 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-28 03:51:22,926 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-28 03:51:22,927 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-28 03:51:22,927 INFO L275 PluginConnector]: CDTParser initialized [2021-12-28 03:51:22,928 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-consumption/linux-3.8-rc1-32_7a-drivers--hwmon--w83793.ko-ldv_main0.cil.out.i [2021-12-28 03:51:22,971 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/073ac7741/e8c13bc760af4b2696283ceb21d99113/FLAGd14de7352 [2021-12-28 03:51:23,550 INFO L306 CDTParser]: Found 1 translation units. [2021-12-28 03:51:23,551 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-consumption/linux-3.8-rc1-32_7a-drivers--hwmon--w83793.ko-ldv_main0.cil.out.i [2021-12-28 03:51:23,584 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/073ac7741/e8c13bc760af4b2696283ceb21d99113/FLAGd14de7352 [2021-12-28 03:51:24,026 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/073ac7741/e8c13bc760af4b2696283ceb21d99113 [2021-12-28 03:51:24,037 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-28 03:51:24,039 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-28 03:51:24,040 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-28 03:51:24,040 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-28 03:51:24,043 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-28 03:51:24,043 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.12 03:51:24" (1/1) ... [2021-12-28 03:51:24,044 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1180173f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:51:24, skipping insertion in model container [2021-12-28 03:51:24,044 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.12 03:51:24" (1/1) ... [2021-12-28 03:51:24,048 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-28 03:51:24,129 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-28 03:51:25,124 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-consumption/linux-3.8-rc1-32_7a-drivers--hwmon--w83793.ko-ldv_main0.cil.out.i[254705,254718] [2021-12-28 03:51:25,207 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-28 03:51:25,324 INFO L203 MainTranslator]: Completed pre-run [2021-12-28 03:51:25,641 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-consumption/linux-3.8-rc1-32_7a-drivers--hwmon--w83793.ko-ldv_main0.cil.out.i[254705,254718] [2021-12-28 03:51:25,655 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-28 03:51:26,032 INFO L208 MainTranslator]: Completed translation [2021-12-28 03:51:26,033 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:51:26 WrapperNode [2021-12-28 03:51:26,034 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-28 03:51:26,035 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-28 03:51:26,035 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-28 03:51:26,035 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-28 03:51:26,040 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:51:26" (1/1) ... [2021-12-28 03:51:26,145 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:51:26" (1/1) ... [2021-12-28 03:51:26,343 INFO L137 Inliner]: procedures = 243, calls = 6386, calls flagged for inlining = 118, calls inlined = 80, statements flattened = 7271 [2021-12-28 03:51:26,344 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-28 03:51:26,345 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-28 03:51:26,345 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-28 03:51:26,345 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-28 03:51:26,351 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:51:26" (1/1) ... [2021-12-28 03:51:26,351 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:51:26" (1/1) ... [2021-12-28 03:51:26,404 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:51:26" (1/1) ... [2021-12-28 03:51:26,404 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:51:26" (1/1) ... [2021-12-28 03:51:26,524 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:51:26" (1/1) ... [2021-12-28 03:51:26,538 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:51:26" (1/1) ... [2021-12-28 03:51:26,628 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:51:26" (1/1) ... [2021-12-28 03:51:26,662 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-28 03:51:26,664 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-28 03:51:26,664 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-28 03:51:26,664 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-28 03:51:26,665 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:51:26" (1/1) ... [2021-12-28 03:51:26,670 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-28 03:51:26,678 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 03:51:26,688 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-28 03:51:26,711 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-28 03:51:26,718 INFO L130 BoogieDeclarations]: Found specification of procedure watchdog_enable [2021-12-28 03:51:26,719 INFO L138 BoogieDeclarations]: Found implementation of procedure watchdog_enable [2021-12-28 03:51:26,719 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-12-28 03:51:26,719 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-12-28 03:51:26,719 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_unlock_watchdog_lock_of_w83793_data [2021-12-28 03:51:26,719 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_unlock_watchdog_lock_of_w83793_data [2021-12-28 03:51:26,719 INFO L130 BoogieDeclarations]: Found specification of procedure w83793_write_value [2021-12-28 03:51:26,720 INFO L138 BoogieDeclarations]: Found implementation of procedure w83793_write_value [2021-12-28 03:51:26,720 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_unlock_watchdog_data_mutex [2021-12-28 03:51:26,720 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_unlock_watchdog_data_mutex [2021-12-28 03:51:26,720 INFO L130 BoogieDeclarations]: Found specification of procedure w83793_read_value [2021-12-28 03:51:26,720 INFO L138 BoogieDeclarations]: Found implementation of procedure w83793_read_value [2021-12-28 03:51:26,720 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_trylock [2021-12-28 03:51:26,720 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_trylock [2021-12-28 03:51:26,720 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2021-12-28 03:51:26,720 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2021-12-28 03:51:26,721 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2021-12-28 03:51:26,721 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2021-12-28 03:51:26,721 INFO L130 BoogieDeclarations]: Found specification of procedure device_create_file [2021-12-28 03:51:26,721 INFO L138 BoogieDeclarations]: Found implementation of procedure device_create_file [2021-12-28 03:51:26,721 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_return_value [2021-12-28 03:51:26,721 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_return_value [2021-12-28 03:51:26,721 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock [2021-12-28 03:51:26,721 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock [2021-12-28 03:51:26,721 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-28 03:51:26,722 INFO L130 BoogieDeclarations]: Found specification of procedure i2c_smbus_read_byte_data [2021-12-28 03:51:26,722 INFO L138 BoogieDeclarations]: Found implementation of procedure i2c_smbus_read_byte_data [2021-12-28 03:51:26,722 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-28 03:51:26,722 INFO L130 BoogieDeclarations]: Found specification of procedure __xadd_wrong_size [2021-12-28 03:51:26,722 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-28 03:51:26,722 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-28 03:51:26,722 INFO L130 BoogieDeclarations]: Found specification of procedure might_fault [2021-12-28 03:51:26,722 INFO L138 BoogieDeclarations]: Found implementation of procedure might_fault [2021-12-28 03:51:26,722 INFO L130 BoogieDeclarations]: Found specification of procedure i2c_unregister_device [2021-12-28 03:51:26,723 INFO L138 BoogieDeclarations]: Found implementation of procedure i2c_unregister_device [2021-12-28 03:51:26,723 INFO L130 BoogieDeclarations]: Found specification of procedure __mutex_init [2021-12-28 03:51:26,723 INFO L138 BoogieDeclarations]: Found implementation of procedure __mutex_init [2021-12-28 03:51:26,723 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_handler_precall [2021-12-28 03:51:26,723 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_handler_precall [2021-12-28 03:51:26,723 INFO L130 BoogieDeclarations]: Found specification of procedure dev_get_drvdata [2021-12-28 03:51:26,723 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_get_drvdata [2021-12-28 03:51:26,724 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-28 03:51:26,724 INFO L130 BoogieDeclarations]: Found specification of procedure i2c_get_clientdata [2021-12-28 03:51:26,724 INFO L138 BoogieDeclarations]: Found implementation of procedure i2c_get_clientdata [2021-12-28 03:51:26,724 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2021-12-28 03:51:26,724 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2021-12-28 03:51:26,724 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_lock_watchdog_lock_of_w83793_data [2021-12-28 03:51:26,724 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_lock_watchdog_lock_of_w83793_data [2021-12-28 03:51:26,725 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-28 03:51:26,725 INFO L130 BoogieDeclarations]: Found specification of procedure kref_put [2021-12-28 03:51:26,725 INFO L138 BoogieDeclarations]: Found implementation of procedure kref_put [2021-12-28 03:51:26,725 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-12-28 03:51:26,725 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-12-28 03:51:26,725 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-28 03:51:26,725 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-28 03:51:26,726 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-28 03:51:26,726 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_lock_watchdog_data_mutex [2021-12-28 03:51:26,726 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_lock_watchdog_data_mutex [2021-12-28 03:51:26,727 INFO L130 BoogieDeclarations]: Found specification of procedure watchdog_disable [2021-12-28 03:51:26,727 INFO L138 BoogieDeclarations]: Found implementation of procedure watchdog_disable [2021-12-28 03:51:26,727 INFO L130 BoogieDeclarations]: Found specification of procedure warn_slowpath_null [2021-12-28 03:51:26,727 INFO L138 BoogieDeclarations]: Found implementation of procedure warn_slowpath_null [2021-12-28 03:51:26,728 INFO L130 BoogieDeclarations]: Found specification of procedure hwmon_device_unregister [2021-12-28 03:51:26,728 INFO L138 BoogieDeclarations]: Found implementation of procedure hwmon_device_unregister [2021-12-28 03:51:26,728 INFO L130 BoogieDeclarations]: Found specification of procedure i2c_new_dummy [2021-12-28 03:51:26,728 INFO L138 BoogieDeclarations]: Found implementation of procedure i2c_new_dummy [2021-12-28 03:51:26,728 INFO L130 BoogieDeclarations]: Found specification of procedure watchdog_trigger [2021-12-28 03:51:26,728 INFO L138 BoogieDeclarations]: Found implementation of procedure watchdog_trigger [2021-12-28 03:51:26,728 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-28 03:51:26,728 INFO L130 BoogieDeclarations]: Found specification of procedure i2c_smbus_write_byte_data [2021-12-28 03:51:26,728 INFO L138 BoogieDeclarations]: Found implementation of procedure i2c_smbus_write_byte_data [2021-12-28 03:51:26,729 INFO L130 BoogieDeclarations]: Found specification of procedure device_remove_file [2021-12-28 03:51:26,729 INFO L138 BoogieDeclarations]: Found implementation of procedure device_remove_file [2021-12-28 03:51:26,729 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-28 03:51:26,729 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-28 03:51:27,029 INFO L234 CfgBuilder]: Building ICFG [2021-12-28 03:51:27,052 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-28 03:51:36,422 INFO L275 CfgBuilder]: Performing block encoding [2021-12-28 03:51:36,430 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-28 03:51:36,430 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-28 03:51:36,432 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.12 03:51:36 BoogieIcfgContainer [2021-12-28 03:51:36,432 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-28 03:51:36,433 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-28 03:51:36,433 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-28 03:51:36,435 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-28 03:51:36,435 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.12 03:51:24" (1/3) ... [2021-12-28 03:51:36,436 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ba66ae4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.12 03:51:36, skipping insertion in model container [2021-12-28 03:51:36,436 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:51:26" (2/3) ... [2021-12-28 03:51:36,436 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ba66ae4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.12 03:51:36, skipping insertion in model container [2021-12-28 03:51:36,436 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.12 03:51:36" (3/3) ... [2021-12-28 03:51:36,437 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-3.8-rc1-32_7a-drivers--hwmon--w83793.ko-ldv_main0.cil.out.i [2021-12-28 03:51:36,440 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-28 03:51:36,441 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-28 03:51:36,483 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-28 03:51:36,490 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-28 03:51:36,491 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-28 03:51:36,525 INFO L276 IsEmpty]: Start isEmpty. Operand has 712 states, 509 states have (on average 1.381139489194499) internal successors, (703), 523 states have internal predecessors, (703), 170 states have call successors, (170), 31 states have call predecessors, (170), 31 states have return successors, (170), 170 states have call predecessors, (170), 170 states have call successors, (170) [2021-12-28 03:51:36,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-28 03:51:36,527 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:51:36,528 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:51:36,528 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:51:36,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:51:36,532 INFO L85 PathProgramCache]: Analyzing trace with hash -1430383953, now seen corresponding path program 1 times [2021-12-28 03:51:36,538 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:51:36,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256973840] [2021-12-28 03:51:36,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:51:36,539 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:51:36,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:51:37,313 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:51:37,313 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:51:37,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256973840] [2021-12-28 03:51:37,314 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256973840] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:51:37,314 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:51:37,314 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 03:51:37,315 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221127749] [2021-12-28 03:51:37,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:51:37,318 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 03:51:37,318 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:51:37,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 03:51:37,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 03:51:37,337 INFO L87 Difference]: Start difference. First operand has 712 states, 509 states have (on average 1.381139489194499) internal successors, (703), 523 states have internal predecessors, (703), 170 states have call successors, (170), 31 states have call predecessors, (170), 31 states have return successors, (170), 170 states have call predecessors, (170), 170 states have call successors, (170) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:51:37,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:51:37,708 INFO L93 Difference]: Finished difference Result 1418 states and 2144 transitions. [2021-12-28 03:51:37,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 03:51:37,710 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-12-28 03:51:37,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:51:37,721 INFO L225 Difference]: With dead ends: 1418 [2021-12-28 03:51:37,721 INFO L226 Difference]: Without dead ends: 705 [2021-12-28 03:51:37,727 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 03:51:37,730 INFO L933 BasicCegarLoop]: 1025 mSDtfsCounter, 1020 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1020 SdHoareTripleChecker+Valid, 1025 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-28 03:51:37,732 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1020 Valid, 1025 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-28 03:51:37,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 705 states. [2021-12-28 03:51:37,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 705 to 705. [2021-12-28 03:51:37,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 705 states, 505 states have (on average 1.3722772277227724) internal successors, (693), 516 states have internal predecessors, (693), 169 states have call successors, (169), 31 states have call predecessors, (169), 30 states have return successors, (160), 160 states have call predecessors, (160), 160 states have call successors, (160) [2021-12-28 03:51:37,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 705 states to 705 states and 1022 transitions. [2021-12-28 03:51:37,796 INFO L78 Accepts]: Start accepts. Automaton has 705 states and 1022 transitions. Word has length 9 [2021-12-28 03:51:37,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:51:37,796 INFO L470 AbstractCegarLoop]: Abstraction has 705 states and 1022 transitions. [2021-12-28 03:51:37,796 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:51:37,797 INFO L276 IsEmpty]: Start isEmpty. Operand 705 states and 1022 transitions. [2021-12-28 03:51:37,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-28 03:51:37,797 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:51:37,797 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:51:37,797 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-28 03:51:37,798 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:51:37,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:51:37,798 INFO L85 PathProgramCache]: Analyzing trace with hash -1392603559, now seen corresponding path program 1 times [2021-12-28 03:51:37,798 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:51:37,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221636216] [2021-12-28 03:51:37,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:51:37,799 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:51:38,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:51:38,231 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:51:38,232 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:51:38,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221636216] [2021-12-28 03:51:38,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221636216] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:51:38,233 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:51:38,233 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 03:51:38,233 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052132472] [2021-12-28 03:51:38,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:51:38,234 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 03:51:38,234 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:51:38,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 03:51:38,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 03:51:38,237 INFO L87 Difference]: Start difference. First operand 705 states and 1022 transitions. Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:51:38,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:51:38,466 INFO L93 Difference]: Finished difference Result 707 states and 1023 transitions. [2021-12-28 03:51:38,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 03:51:38,466 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-12-28 03:51:38,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:51:38,471 INFO L225 Difference]: With dead ends: 707 [2021-12-28 03:51:38,471 INFO L226 Difference]: Without dead ends: 704 [2021-12-28 03:51:38,472 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 03:51:38,472 INFO L933 BasicCegarLoop]: 1019 mSDtfsCounter, 1013 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1013 SdHoareTripleChecker+Valid, 1019 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-28 03:51:38,473 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1013 Valid, 1019 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-28 03:51:38,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 704 states. [2021-12-28 03:51:38,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 704 to 704. [2021-12-28 03:51:38,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 704 states, 505 states have (on average 1.3702970297029704) internal successors, (692), 515 states have internal predecessors, (692), 168 states have call successors, (168), 31 states have call predecessors, (168), 30 states have return successors, (160), 160 states have call predecessors, (160), 160 states have call successors, (160) [2021-12-28 03:51:38,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 704 states to 704 states and 1020 transitions. [2021-12-28 03:51:38,505 INFO L78 Accepts]: Start accepts. Automaton has 704 states and 1020 transitions. Word has length 10 [2021-12-28 03:51:38,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:51:38,505 INFO L470 AbstractCegarLoop]: Abstraction has 704 states and 1020 transitions. [2021-12-28 03:51:38,506 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:51:38,506 INFO L276 IsEmpty]: Start isEmpty. Operand 704 states and 1020 transitions. [2021-12-28 03:51:38,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-28 03:51:38,506 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:51:38,507 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:51:38,507 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-28 03:51:38,507 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:51:38,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:51:38,507 INFO L85 PathProgramCache]: Analyzing trace with hash -221406478, now seen corresponding path program 1 times [2021-12-28 03:51:38,508 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:51:38,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825777348] [2021-12-28 03:51:38,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:51:38,508 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:51:38,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:51:38,929 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:51:38,930 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:51:38,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825777348] [2021-12-28 03:51:38,930 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825777348] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:51:38,930 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:51:38,930 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 03:51:38,930 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057463737] [2021-12-28 03:51:38,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:51:38,931 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 03:51:38,931 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:51:38,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 03:51:38,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 03:51:38,932 INFO L87 Difference]: Start difference. First operand 704 states and 1020 transitions. Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:51:39,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:51:39,186 INFO L93 Difference]: Finished difference Result 706 states and 1021 transitions. [2021-12-28 03:51:39,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 03:51:39,189 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-12-28 03:51:39,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:51:39,194 INFO L225 Difference]: With dead ends: 706 [2021-12-28 03:51:39,194 INFO L226 Difference]: Without dead ends: 703 [2021-12-28 03:51:39,197 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 03:51:39,211 INFO L933 BasicCegarLoop]: 1017 mSDtfsCounter, 1010 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1010 SdHoareTripleChecker+Valid, 1017 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-28 03:51:39,212 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1010 Valid, 1017 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-28 03:51:39,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 703 states. [2021-12-28 03:51:39,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 703 to 703. [2021-12-28 03:51:39,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 703 states, 505 states have (on average 1.3683168316831684) internal successors, (691), 514 states have internal predecessors, (691), 167 states have call successors, (167), 31 states have call predecessors, (167), 30 states have return successors, (160), 160 states have call predecessors, (160), 160 states have call successors, (160) [2021-12-28 03:51:39,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 703 states to 703 states and 1018 transitions. [2021-12-28 03:51:39,268 INFO L78 Accepts]: Start accepts. Automaton has 703 states and 1018 transitions. Word has length 11 [2021-12-28 03:51:39,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:51:39,269 INFO L470 AbstractCegarLoop]: Abstraction has 703 states and 1018 transitions. [2021-12-28 03:51:39,269 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:51:39,269 INFO L276 IsEmpty]: Start isEmpty. Operand 703 states and 1018 transitions. [2021-12-28 03:51:39,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-12-28 03:51:39,270 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:51:39,270 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:51:39,271 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-28 03:51:39,271 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:51:39,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:51:39,272 INFO L85 PathProgramCache]: Analyzing trace with hash 1725969532, now seen corresponding path program 1 times [2021-12-28 03:51:39,272 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:51:39,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602040612] [2021-12-28 03:51:39,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:51:39,273 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:51:39,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:51:39,798 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:51:39,799 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:51:39,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602040612] [2021-12-28 03:51:39,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602040612] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:51:39,799 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:51:39,799 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 03:51:39,800 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730127052] [2021-12-28 03:51:39,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:51:39,803 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 03:51:39,803 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:51:39,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 03:51:39,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 03:51:39,804 INFO L87 Difference]: Start difference. First operand 703 states and 1018 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:51:40,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:51:40,079 INFO L93 Difference]: Finished difference Result 2011 states and 2918 transitions. [2021-12-28 03:51:40,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 03:51:40,080 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-12-28 03:51:40,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:51:40,092 INFO L225 Difference]: With dead ends: 2011 [2021-12-28 03:51:40,093 INFO L226 Difference]: Without dead ends: 1311 [2021-12-28 03:51:40,095 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 03:51:40,100 INFO L933 BasicCegarLoop]: 1151 mSDtfsCounter, 920 mSDsluCounter, 958 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 920 SdHoareTripleChecker+Valid, 2109 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-28 03:51:40,101 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [920 Valid, 2109 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-28 03:51:40,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1311 states. [2021-12-28 03:51:40,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1311 to 1306. [2021-12-28 03:51:40,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1306 states, 950 states have (on average 1.3747368421052633) internal successors, (1306), 965 states have internal predecessors, (1306), 298 states have call successors, (298), 60 states have call predecessors, (298), 57 states have return successors, (290), 285 states have call predecessors, (290), 290 states have call successors, (290) [2021-12-28 03:51:40,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1306 states to 1306 states and 1894 transitions. [2021-12-28 03:51:40,164 INFO L78 Accepts]: Start accepts. Automaton has 1306 states and 1894 transitions. Word has length 12 [2021-12-28 03:51:40,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:51:40,164 INFO L470 AbstractCegarLoop]: Abstraction has 1306 states and 1894 transitions. [2021-12-28 03:51:40,165 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:51:40,165 INFO L276 IsEmpty]: Start isEmpty. Operand 1306 states and 1894 transitions. [2021-12-28 03:51:40,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-28 03:51:40,166 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:51:40,166 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:51:40,166 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-28 03:51:40,166 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:51:40,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:51:40,167 INFO L85 PathProgramCache]: Analyzing trace with hash 1965088565, now seen corresponding path program 1 times [2021-12-28 03:51:40,167 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:51:40,167 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497864457] [2021-12-28 03:51:40,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:51:40,168 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:51:40,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:51:40,584 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:51:40,584 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:51:40,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497864457] [2021-12-28 03:51:40,585 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497864457] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:51:40,585 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:51:40,585 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 03:51:40,585 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182493795] [2021-12-28 03:51:40,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:51:40,585 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 03:51:40,585 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:51:40,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 03:51:40,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 03:51:40,586 INFO L87 Difference]: Start difference. First operand 1306 states and 1894 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:51:40,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:51:40,816 INFO L93 Difference]: Finished difference Result 1377 states and 1968 transitions. [2021-12-28 03:51:40,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 03:51:40,816 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-12-28 03:51:40,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:51:40,821 INFO L225 Difference]: With dead ends: 1377 [2021-12-28 03:51:40,821 INFO L226 Difference]: Without dead ends: 1367 [2021-12-28 03:51:40,822 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 03:51:40,823 INFO L933 BasicCegarLoop]: 1037 mSDtfsCounter, 940 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 940 SdHoareTripleChecker+Valid, 1135 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-28 03:51:40,823 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [940 Valid, 1135 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-28 03:51:40,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1367 states. [2021-12-28 03:51:40,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1367 to 1365. [2021-12-28 03:51:40,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1365 states, 990 states have (on average 1.3575757575757577) internal successors, (1344), 1003 states have internal predecessors, (1344), 306 states have call successors, (306), 71 states have call predecessors, (306), 68 states have return successors, (300), 295 states have call predecessors, (300), 300 states have call successors, (300) [2021-12-28 03:51:40,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1365 states to 1365 states and 1950 transitions. [2021-12-28 03:51:40,861 INFO L78 Accepts]: Start accepts. Automaton has 1365 states and 1950 transitions. Word has length 13 [2021-12-28 03:51:40,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:51:40,862 INFO L470 AbstractCegarLoop]: Abstraction has 1365 states and 1950 transitions. [2021-12-28 03:51:40,862 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:51:40,862 INFO L276 IsEmpty]: Start isEmpty. Operand 1365 states and 1950 transitions. [2021-12-28 03:51:40,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-12-28 03:51:40,864 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:51:40,864 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:51:40,865 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-28 03:51:40,865 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:51:40,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:51:40,865 INFO L85 PathProgramCache]: Analyzing trace with hash -1573637770, now seen corresponding path program 1 times [2021-12-28 03:51:40,865 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:51:40,866 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174237128] [2021-12-28 03:51:40,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:51:40,866 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:51:41,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:51:41,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-28 03:51:41,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:51:41,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-28 03:51:41,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:51:41,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-28 03:51:41,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:51:41,356 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:51:41,357 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:51:41,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174237128] [2021-12-28 03:51:41,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [174237128] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:51:41,357 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:51:41,357 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-28 03:51:41,357 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605622883] [2021-12-28 03:51:41,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:51:41,358 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-28 03:51:41,358 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:51:41,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-28 03:51:41,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-28 03:51:41,359 INFO L87 Difference]: Start difference. First operand 1365 states and 1950 transitions. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-28 03:51:42,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:51:42,516 INFO L93 Difference]: Finished difference Result 2730 states and 3899 transitions. [2021-12-28 03:51:42,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-28 03:51:42,516 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 36 [2021-12-28 03:51:42,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:51:42,522 INFO L225 Difference]: With dead ends: 2730 [2021-12-28 03:51:42,522 INFO L226 Difference]: Without dead ends: 1368 [2021-12-28 03:51:42,527 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-28 03:51:42,528 INFO L933 BasicCegarLoop]: 1698 mSDtfsCounter, 904 mSDsluCounter, 1710 mSDsCounter, 0 mSdLazyCounter, 672 mSolverCounterSat, 256 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1036 SdHoareTripleChecker+Valid, 3408 SdHoareTripleChecker+Invalid, 928 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 256 IncrementalHoareTripleChecker+Valid, 672 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-28 03:51:42,528 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1036 Valid, 3408 Invalid, 928 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [256 Valid, 672 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-28 03:51:42,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1368 states. [2021-12-28 03:51:42,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1368 to 1365. [2021-12-28 03:51:42,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1365 states, 990 states have (on average 1.3545454545454545) internal successors, (1341), 1003 states have internal predecessors, (1341), 306 states have call successors, (306), 71 states have call predecessors, (306), 68 states have return successors, (295), 295 states have call predecessors, (295), 295 states have call successors, (295) [2021-12-28 03:51:42,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1365 states to 1365 states and 1942 transitions. [2021-12-28 03:51:42,570 INFO L78 Accepts]: Start accepts. Automaton has 1365 states and 1942 transitions. Word has length 36 [2021-12-28 03:51:42,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:51:42,570 INFO L470 AbstractCegarLoop]: Abstraction has 1365 states and 1942 transitions. [2021-12-28 03:51:42,571 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-28 03:51:42,571 INFO L276 IsEmpty]: Start isEmpty. Operand 1365 states and 1942 transitions. [2021-12-28 03:51:42,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-12-28 03:51:42,573 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:51:42,573 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:51:42,573 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-28 03:51:42,573 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:51:42,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:51:42,574 INFO L85 PathProgramCache]: Analyzing trace with hash -609819484, now seen corresponding path program 1 times [2021-12-28 03:51:42,574 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:51:42,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46860802] [2021-12-28 03:51:42,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:51:42,576 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:51:42,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:51:43,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-28 03:51:43,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:51:43,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-28 03:51:43,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:51:43,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-28 03:51:43,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:51:43,036 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:51:43,036 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:51:43,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46860802] [2021-12-28 03:51:43,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46860802] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:51:43,036 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:51:43,036 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-28 03:51:43,037 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745618060] [2021-12-28 03:51:43,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:51:43,037 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-28 03:51:43,037 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:51:43,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-28 03:51:43,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-28 03:51:43,038 INFO L87 Difference]: Start difference. First operand 1365 states and 1942 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 1 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-28 03:51:43,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:51:43,982 INFO L93 Difference]: Finished difference Result 3166 states and 4572 transitions. [2021-12-28 03:51:43,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-28 03:51:43,983 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 1 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 38 [2021-12-28 03:51:43,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:51:43,991 INFO L225 Difference]: With dead ends: 3166 [2021-12-28 03:51:43,991 INFO L226 Difference]: Without dead ends: 1804 [2021-12-28 03:51:43,995 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-28 03:51:43,995 INFO L933 BasicCegarLoop]: 1101 mSDtfsCounter, 612 mSDsluCounter, 1314 mSDsCounter, 0 mSdLazyCounter, 497 mSolverCounterSat, 279 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 744 SdHoareTripleChecker+Valid, 2415 SdHoareTripleChecker+Invalid, 776 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 279 IncrementalHoareTripleChecker+Valid, 497 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-28 03:51:43,996 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [744 Valid, 2415 Invalid, 776 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [279 Valid, 497 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-28 03:51:43,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1804 states. [2021-12-28 03:51:44,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1804 to 1798. [2021-12-28 03:51:44,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1798 states, 1315 states have (on average 1.3741444866920152) internal successors, (1807), 1329 states have internal predecessors, (1807), 414 states have call successors, (414), 71 states have call predecessors, (414), 68 states have return successors, (403), 403 states have call predecessors, (403), 403 states have call successors, (403) [2021-12-28 03:51:44,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1798 states to 1798 states and 2624 transitions. [2021-12-28 03:51:44,057 INFO L78 Accepts]: Start accepts. Automaton has 1798 states and 2624 transitions. Word has length 38 [2021-12-28 03:51:44,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:51:44,057 INFO L470 AbstractCegarLoop]: Abstraction has 1798 states and 2624 transitions. [2021-12-28 03:51:44,057 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 1 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-28 03:51:44,057 INFO L276 IsEmpty]: Start isEmpty. Operand 1798 states and 2624 transitions. [2021-12-28 03:51:44,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-12-28 03:51:44,061 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:51:44,061 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:51:44,061 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-28 03:51:44,061 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:51:44,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:51:44,062 INFO L85 PathProgramCache]: Analyzing trace with hash -777098256, now seen corresponding path program 1 times [2021-12-28 03:51:44,062 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:51:44,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36230729] [2021-12-28 03:51:44,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:51:44,063 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:51:44,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:51:44,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-28 03:51:44,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:51:44,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-28 03:51:44,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:51:44,716 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:51:44,716 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:51:44,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36230729] [2021-12-28 03:51:44,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36230729] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:51:44,716 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:51:44,717 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-28 03:51:44,717 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558253941] [2021-12-28 03:51:44,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:51:44,717 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-28 03:51:44,717 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:51:44,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-28 03:51:44,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-28 03:51:44,718 INFO L87 Difference]: Start difference. First operand 1798 states and 2624 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-28 03:51:47,113 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-28 03:51:50,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:51:50,549 INFO L93 Difference]: Finished difference Result 5684 states and 8377 transitions. [2021-12-28 03:51:50,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-28 03:51:50,550 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 36 [2021-12-28 03:51:50,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:51:50,567 INFO L225 Difference]: With dead ends: 5684 [2021-12-28 03:51:50,567 INFO L226 Difference]: Without dead ends: 3889 [2021-12-28 03:51:50,574 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-28 03:51:50,575 INFO L933 BasicCegarLoop]: 1941 mSDtfsCounter, 1233 mSDsluCounter, 2380 mSDsCounter, 0 mSdLazyCounter, 888 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1355 SdHoareTripleChecker+Valid, 4321 SdHoareTripleChecker+Invalid, 971 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 888 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2021-12-28 03:51:50,575 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1355 Valid, 4321 Invalid, 971 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 888 Invalid, 0 Unknown, 0 Unchecked, 5.6s Time] [2021-12-28 03:51:50,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3889 states. [2021-12-28 03:51:50,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3889 to 2588. [2021-12-28 03:51:50,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2588 states, 1857 states have (on average 1.3489499192245558) internal successors, (2505), 1887 states have internal predecessors, (2505), 605 states have call successors, (605), 128 states have call predecessors, (605), 125 states have return successors, (618), 581 states have call predecessors, (618), 594 states have call successors, (618) [2021-12-28 03:51:50,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2588 states to 2588 states and 3728 transitions. [2021-12-28 03:51:50,785 INFO L78 Accepts]: Start accepts. Automaton has 2588 states and 3728 transitions. Word has length 36 [2021-12-28 03:51:50,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:51:50,787 INFO L470 AbstractCegarLoop]: Abstraction has 2588 states and 3728 transitions. [2021-12-28 03:51:50,787 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-28 03:51:50,787 INFO L276 IsEmpty]: Start isEmpty. Operand 2588 states and 3728 transitions. [2021-12-28 03:51:50,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-12-28 03:51:50,788 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:51:50,788 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:51:50,789 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-28 03:51:50,789 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:51:50,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:51:50,789 INFO L85 PathProgramCache]: Analyzing trace with hash 1132186480, now seen corresponding path program 1 times [2021-12-28 03:51:50,789 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:51:50,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393918495] [2021-12-28 03:51:50,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:51:50,790 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:51:51,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:51:51,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-28 03:51:51,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:51:51,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-28 03:51:51,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:51:51,338 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:51:51,339 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:51:51,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393918495] [2021-12-28 03:51:51,339 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393918495] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:51:51,339 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:51:51,339 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-28 03:51:51,339 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835143526] [2021-12-28 03:51:51,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:51:51,340 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-28 03:51:51,340 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:51:51,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-28 03:51:51,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-28 03:51:51,341 INFO L87 Difference]: Start difference. First operand 2588 states and 3728 transitions. Second operand has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-28 03:51:51,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:51:51,830 INFO L93 Difference]: Finished difference Result 3782 states and 5613 transitions. [2021-12-28 03:51:51,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-28 03:51:51,830 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 39 [2021-12-28 03:51:51,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:51:51,847 INFO L225 Difference]: With dead ends: 3782 [2021-12-28 03:51:51,847 INFO L226 Difference]: Without dead ends: 3708 [2021-12-28 03:51:51,849 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-28 03:51:51,850 INFO L933 BasicCegarLoop]: 2159 mSDtfsCounter, 1685 mSDsluCounter, 4583 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 367 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1780 SdHoareTripleChecker+Valid, 6742 SdHoareTripleChecker+Invalid, 383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 367 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-28 03:51:51,850 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1780 Valid, 6742 Invalid, 383 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [367 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-28 03:51:51,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3708 states. [2021-12-28 03:51:52,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3708 to 2519. [2021-12-28 03:51:52,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2519 states, 1803 states have (on average 1.346089850249584) internal successors, (2427), 1829 states have internal predecessors, (2427), 593 states have call successors, (593), 124 states have call predecessors, (593), 122 states have return successors, (608), 572 states have call predecessors, (608), 584 states have call successors, (608) [2021-12-28 03:51:52,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2519 states to 2519 states and 3628 transitions. [2021-12-28 03:51:52,022 INFO L78 Accepts]: Start accepts. Automaton has 2519 states and 3628 transitions. Word has length 39 [2021-12-28 03:51:52,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:51:52,023 INFO L470 AbstractCegarLoop]: Abstraction has 2519 states and 3628 transitions. [2021-12-28 03:51:52,023 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-28 03:51:52,024 INFO L276 IsEmpty]: Start isEmpty. Operand 2519 states and 3628 transitions. [2021-12-28 03:51:52,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-12-28 03:51:52,025 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:51:52,025 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:51:52,025 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-28 03:51:52,025 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:51:52,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:51:52,026 INFO L85 PathProgramCache]: Analyzing trace with hash 723958053, now seen corresponding path program 1 times [2021-12-28 03:51:52,026 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:51:52,026 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216686730] [2021-12-28 03:51:52,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:51:52,026 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:51:52,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:51:52,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-28 03:51:52,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:51:52,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-28 03:51:52,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:51:52,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-28 03:51:52,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:51:52,491 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:51:52,491 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:51:52,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216686730] [2021-12-28 03:51:52,491 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216686730] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:51:52,492 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:51:52,492 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-28 03:51:52,492 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395156686] [2021-12-28 03:51:52,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:51:52,492 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-28 03:51:52,493 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:51:52,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-28 03:51:52,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-28 03:51:52,493 INFO L87 Difference]: Start difference. First operand 2519 states and 3628 transitions. Second operand has 5 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-28 03:51:52,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:51:52,960 INFO L93 Difference]: Finished difference Result 3839 states and 5649 transitions. [2021-12-28 03:51:52,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-28 03:51:52,960 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 39 [2021-12-28 03:51:52,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:51:52,973 INFO L225 Difference]: With dead ends: 3839 [2021-12-28 03:51:52,973 INFO L226 Difference]: Without dead ends: 2994 [2021-12-28 03:51:52,977 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-28 03:51:52,978 INFO L933 BasicCegarLoop]: 1744 mSDtfsCounter, 1630 mSDsluCounter, 3204 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 390 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1631 SdHoareTripleChecker+Valid, 4948 SdHoareTripleChecker+Invalid, 406 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 390 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-28 03:51:52,978 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1631 Valid, 4948 Invalid, 406 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [390 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-28 03:51:52,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2994 states. [2021-12-28 03:51:53,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2994 to 1805. [2021-12-28 03:51:53,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1805 states, 1287 states have (on average 1.3286713286713288) internal successors, (1710), 1299 states have internal predecessors, (1710), 427 states have call successors, (427), 91 states have call predecessors, (427), 90 states have return successors, (443), 420 states have call predecessors, (443), 426 states have call successors, (443) [2021-12-28 03:51:53,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1805 states to 1805 states and 2580 transitions. [2021-12-28 03:51:53,120 INFO L78 Accepts]: Start accepts. Automaton has 1805 states and 2580 transitions. Word has length 39 [2021-12-28 03:51:53,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:51:53,120 INFO L470 AbstractCegarLoop]: Abstraction has 1805 states and 2580 transitions. [2021-12-28 03:51:53,120 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-28 03:51:53,120 INFO L276 IsEmpty]: Start isEmpty. Operand 1805 states and 2580 transitions. [2021-12-28 03:51:53,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-28 03:51:53,122 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:51:53,122 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:51:53,123 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-28 03:51:53,123 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:51:53,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:51:53,123 INFO L85 PathProgramCache]: Analyzing trace with hash -1946233624, now seen corresponding path program 1 times [2021-12-28 03:51:53,123 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:51:53,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430445948] [2021-12-28 03:51:53,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:51:53,124 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:51:53,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:51:53,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-28 03:51:53,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:51:53,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-28 03:51:53,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:51:53,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-28 03:51:53,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:51:53,572 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:51:53,572 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:51:53,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430445948] [2021-12-28 03:51:53,572 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430445948] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:51:53,573 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:51:53,573 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-28 03:51:53,573 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582344978] [2021-12-28 03:51:53,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:51:53,574 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-28 03:51:53,574 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:51:53,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-28 03:51:53,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-28 03:51:53,575 INFO L87 Difference]: Start difference. First operand 1805 states and 2580 transitions. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 3 states have internal predecessors, (33), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-28 03:51:54,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:51:54,484 INFO L93 Difference]: Finished difference Result 1805 states and 2580 transitions. [2021-12-28 03:51:54,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-28 03:51:54,484 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 3 states have internal predecessors, (33), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 41 [2021-12-28 03:51:54,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:51:54,485 INFO L225 Difference]: With dead ends: 1805 [2021-12-28 03:51:54,485 INFO L226 Difference]: Without dead ends: 0 [2021-12-28 03:51:54,489 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-28 03:51:54,489 INFO L933 BasicCegarLoop]: 984 mSDtfsCounter, 176 mSDsluCounter, 1291 mSDsCounter, 0 mSdLazyCounter, 399 mSolverCounterSat, 177 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 2275 SdHoareTripleChecker+Invalid, 576 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 177 IncrementalHoareTripleChecker+Valid, 399 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-28 03:51:54,489 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [199 Valid, 2275 Invalid, 576 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [177 Valid, 399 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-28 03:51:54,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-12-28 03:51:54,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-12-28 03:51:54,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:51:54,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-12-28 03:51:54,491 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 41 [2021-12-28 03:51:54,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:51:54,491 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-12-28 03:51:54,491 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 3 states have internal predecessors, (33), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-28 03:51:54,491 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-12-28 03:51:54,491 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-12-28 03:51:54,493 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-12-28 03:51:54,494 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-28 03:51:54,495 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions.